Cells

1. Cells

2. What is a cell?

3. What is a cell? A cell is the very smallest unit of living matter. All living things, including plants and animals, are made up of cells.

4. What is a cell? A cell is like a chemical factory.

5. What is a cell? There are many different kinds of cells, doing many different jobs in a plant or animal.

6. Differences between plant and animal cells?

7. Animal and plant cells The two kinds you need to be most familiar with are simple animal and plant cells.

8. Cell membrane One part found in all cells is the cell membrane.

9. What does the cell membrane do?

10. Cell membrane The cell membrane surrounds the cell and holds the cell together. It controls what chemicals can enter and leave the cell.

11. Nucleus Another part found in all cells is the nucleus.

12. What does the nucleus do?

13. Nucleus The nucleus controls the cell. Inside the nucleus is DNA which contains genetic information.

14. Cytoplasm All cells also contain cytoplasm.

15. What does the cytoplasm do?

16. Cytoplasm Cytoplasm is a jelly-like mixture of chemicals where most of the work of the cell takes place.

17. Plant cell parts Plant cells may contain some extra parts.

18. Chloroplasts (plant cells) Chloroplasts which are disc shaped and contain chlorophyll for photosynthesis.

19. Cell wall (plant cells) A cell wall which is a strong outer layer to support the cell and give it shape.

20. Vacuole (plant cells) A vacuole where the plant cell stores sap (the food that it has made; a mixture of sugars, salts and water).

21. To summarise:

22. More complicated! In reality, most cells are much more complicated than this!

23. Interesting cell facts: Like all living things, cells die. If you watched a clock for one minute, about three billion cells in your body die. x 3000000000

24. Interesting cell facts: In that same minute, about three billion cells divided so that all the cells that died were replaced. x 3000000000

25. Interesting cell facts: Dead skin cells flake off and dead cells from internal organs will pass through and out of the body with waste products.

26. Interesting cell facts: The length of time cells live can vary. For example, white blood cells only live for thirteen days, red blood cells live for about one hundred and twenty days, liver cells live about eighteen months, and nerve cells can live up to one hundred years!

27. Special cells Palisade cell Nerve cell • There are many different types of cells to do different jobs in plants and animals. • For the 5 cells on this slide can you answer the questions below? • what they do • How they are adapted to do their job Root hair cell Muscle cells Ciliated epithelial cell

28. Many of the same cells? • What do you call a substance made of many of the same kind of cell?

29. Tissues and organs Cells of the same type can be grouped together to form tissues

30. Muscle tissue Muscle cells are grouped together to form muscle tissue.

31. Root hair tissue Root hair cells are grouped together to form root hair tissue

32. Organs Different kinds of tissue can be grouped together to make organs

33. Heart

34. Leaf

35. Root

36. Organ systems Organs can work together in organ systems

37. What’s this system called?

38. Respiratory system

39. ?

40. Excretory system

41. ?

42. Circulatory system

43. ?

44. Nervous system

45. ?

46. Digestive system

47. What is the sex organ of a plant called?

48. Flowers!

49. Do you know the names of the parts of a flower?

50. Parts of a Flower Stamen (male) Carpel (female)